Triple-valve device.



W. V TURNER. TRIPLE VALVE DEVICE.

AYPLIOATION FILED JAN. 19. 1911.

1,073,186, Patented Sept. 16, 1913.

WITNESSES INVENTOR COLUMBIA PLANOGRAPH co-, WASHINGTON. n. c.

urn s'rx'rns rxrnr prion WALTER V. TURNER, OE EDGEWOOD, PENNSYLVANIA,ASSIGNOR TO THE WESTING- HOUSE AIR BRAKECOMPANY, OF PITTSBURGH,PENNSYLVANIA, A CORPORATION or PENNSYLVANIA.

To all whomit'mag conoem: 1'

Be it known that I, WA TE V. TURNER, a citizen of the United States,residing at Edgewood, in the county of Allegheny and State ofPennsylvania have invented new and "useful Improvements in Triple-ValveDevices, of which; the following'is a specification.

This invention relates to automatic fluid pressure brakes, and, has forits object to provide improved means for securing a local ventingoffluid from the train pipe in 1 service applications ofQthe brakes tothereby accelerate the movement of the SllCOGSSlVG' triplevalves-throughout the train.

In the accompanying drawing; Figure 1 is a central sectional view ofatriple valve device embodying'my invention, showing the parts in normalfull release position and Fig. 2a similar view, with the parts shown inservice application position.

The triple valve device illustrated in the drawing is of the so calledretarded release type for securing a more uniform release of the brakes,particularly on long trains, but I wish it understood that my presentimprovement may be applied to various other types of triple valves.

As shown in the drawings, the triple valve device may comprise a casing1 having a piston chamber 2 connected by passage 3 to the train pipe andcontaining triple valve piston 4t, and having a valve chamber 5 open tothe auxiliary reservoir and contain ing main slide valve 6 and auxiliaryslide valve 7 mounted on the'main slide valve and having a' movementrelative thereto.

A yielding resistance. device 8. serves as a stop for the piston 4 todetermine the normal full release position of the valves and is adaptedto yieldingly resist movement of said valves to an inner retardedrelease position in which. the exhaust from the brake munication fromtrain pipe passage 3 to Specification of Letters Patent.

TRIPLE-VALVE DEVICE.

Patented Sept. 16, 1913.

Application filed January 19, 1911. Serial No. 603,560

said chamber and an emergency valve 15 adapted to control conununicationfrom chamber 13 to a passage 16 leading to the brake cylinder. The valve15 is provided with a projecting portion 1'7 adapted to be engaged bythe stem 11 of piston 9, said valve being normally maintained seated bya spring 18. i

In addition to the graduating slide valve 7, an auxiliary puppet valve19 is provided in the main slide valve 6 and this valve is operated bythe movement of triple valve piston 4 in service applicationsto opencommunication from the auxiliary reservoir to a port 20 in the mainslide valve, which port is adapted to register with a passage 21 leadingto one side of the movable abutment 9.

The body of emergency valve 15 has a chamber containing a puppet valve22 having a stem 23 adapted to project out through the portion 17, saidvalve being normally seated by a spring 24.

The train pipe being charged to the standard pressure in the usualmanner, it it is desired to effect a service application of the brakes,a gradual reduction in train pipe pressure is made and the triple valvepiston 4 is then moved outwardly. The first movement of said pistonshifts the auxiliaryslide valve 7 to uncover service port 25 in the mainslide valve and port 20. The main slide valve 6 is then actuated tocause the service port 25 to register with port 26 leading to the brakecylinder passage 27 and port 20 to register with passage 21. Fluid fromthe auxiliary reser voir then flows from the auxiliary reservoir to thebrake cylinder through port 25 and fluid also flows through passage 21to the outer face of the movable abutment 9. The abutment 9 is thereuponoperated and the stem 11 engages the stem 23 and opens the valve 22 tothereby permit air to flow from the train pipe past check valve 14- tochamber 13 and thence through a restricted port 28 to passage 16 and thebrake cylinder. A passage 29 leading to passage 16 is uncovered by theoutward movement of piston 9 so that in the position shown in Fig. 2,the air flowing from the auxiliary reservoir through passage 21 flowsthrough the passage 29 to the brake cylinder. The pressure on the outerface of said abutment is thus relieved and prevents any further outwardmovement of the abutment to open the emergency valve 15.

As soon as the auxiliary reservoir pressure becomes reduced by flow tothe brake cylinder to a point slightly less than'the train pipepressure, the triple valve piston moves inwardly and operates theauxiliary valves 7 and 19 to close the ports 25 and 20 respectively andthe pressures then equaliz ing on opposite sides of the abutment 9, thesame is shifted by the spring 30 to its normal position, permitting thevalve 22 to close and prevent further venting of air from the trainpipe. By making further gradual reductions in train pipe pressure, theauxiliary valves 7 and 19 may be again opened to supply air to the brakecylinder and also supply air to operate the abutment 9 and valve 22 tovent air from the train pipe in accordance with the operationhereinbefore described.

In an emergency application, the piston 4 moves out its full traverseand uncovers the usual large emergency port 31, Which supplies air tothe abutment 9 in such volume as to cause same to move outwardly withfull force and thereby lift the emergency valve 15 from its seat, toproduce the usual emergency venting of air from the train pipe.

Having now described my invention,what I claim as new and desire tosecure by Letters Patent, is

1. A triple valve device for fluid pressure brakes, comprising a piston,a main slide valve operated thereby and having a graduating port adaptedto communicate with a brake cylinder port in service applicationposition, an auxiliary valve movabl with the piston for controlling saidgraduating port, and a second auxiliary valve operated by said pistonand adapted in service application position to effect the opening 01 alocal train pipe discharge port.

2. A triple valve device for fluid pressure brakes, comprising a piston,a main slide valve operated thereby, a graduating slide valve mounted onsaid main slide valve and operated by the piston for controlling a brakecylinder service port, and an auxiliary puppet valve operated by saidpiston and adapted in service application position to effect the openingof a local train pipe discharge port.

8. A triple valve device for fluid pressure brakes, comprising a piston,a main slide valve operated thereby, a graduating slide valve mounted onsaid main slide valve and operated by the piston for controlling a brakecylinder service port, and an auxiliary valve mounted in the main slidevalve and operated by said piston for efi'ecting the opening of a localtrain pipe discharge port.

-l-. A triple valve device for fluid pressure means.

brakes, comprising a piston, a main slide valve operated thereby, agraduating slide valve mounted on said main slide valve and operated bythe piston for "controlling a brake cylinder service port, means forcontrolling a local train pipe discharge port, and an auxiliary valvecarried by the main slide valve and operated in a service application ofthe brakes by said'piston for supplying air to actuate said means.

5. A triple valve device for fluid pressure brakes, comprising a piston,a main slide valve operated thereby and having a brake cylinder serviceport adapted in service application position a to register with a 7brake cylinder port, a graduating slide valve for controlling saidservice port, means operated by How of air from-the auxiliary reservoirto the brake cylinder for controlling a local train pipe dischargeport',andan auxiliary valve carried by the main slide valve and operated bysaid piston in a service application of'the brakes for supplying airfrom the auxiliary reservoir to operate said 6. A triple yalverdeviceforfluid pressure brakes, comprisinga piston, a main slide valveoperatedthereby and having a brake cylinder service portadapted inscrvice'application position to register with a brake cylinder port, agraduating slide valve'for controlling said service port, a valve forcontrolling a local train pipe discharge port,

a movable abutment operated by flow of air.

auxiliary reservoir to the brake cylinder,

an auxiliary valve operated by said piston and having a movementrelative to the main valve for controlling said service port,"and asecond auxiliary valve carried by said main valve and having a movementrelative to the main valve and operated by said piston for effecting theopening of a local train pipe discharge port in a service application ofthe brakes.

8. Atriple valve device, comprising a piston, a main slide valveoperated thereby and having a service port adapted in serviceapplication position to register with a brake cylinder port forsupplying air from the auxiliary reservoir to the brake cylinder, anauxiliary valve operated by said piston and having a movement relativeto the main valve for controlling said service port an emergency valvefor venting the train pipe in an emergency application of the brakes, avalve carried by said emergency valve for locally venting the train pipein a service application of the brakes, a movable abutment operated byflow of air from the auxiliary reservoir to the brake cylinder foropening said service train pipe vent valve,

10 and a second auxiliary valve operated by said piston in a serviceapplication of the brakes for supplying air to actuate said movableabutment.

In testimony whereof I have hereunto set my hand.

\VALTER V. TURNER.

Witnesses:

A. M. CLEMENTS, C. R. ROGERS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

